Q: Car ran out of gas - will not restart after adding more gas

You will need to check to see if the vehicle is flooded for excessive fumes from the filling of the fuel tank. The purge valve or the fuel tank vent valve is leaking fumes into the engine. You will need to have the fuel tank smoke tested to see where the smoke comes out from. If purge valve is leaking then replace it to stop fumes from getting into the engine when the engine is off.